Tumblewolf
  • Tumblewolf
Will fan and medal! Write the standard form of the line that passes through the given points (5,-4) and has a slope of -3/8
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
triciaal
  • triciaal
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triciaal
  • triciaal
the slope of a line is the same for any 2 points on that line.
Tumblewolf
  • Tumblewolf
I know all that. I just don't know how to put it together

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More answers

triciaal
  • triciaal
apply what you know. substitute the values and simplify then rearrange the equation for the standard form.
Tumblewolf
  • Tumblewolf
I have so far y=-3/8(x+B) and I can't figure out the value of b to move on from there
anonymous
  • anonymous
\[y-y _{1}=m \left( x-x _{1} \right)\] m is the slope.
triciaal
  • triciaal
it would be much easier to use the point-slope format
triciaal
  • triciaal
repeat the slope is the same for any 2 points on that line
triciaal
  • triciaal
use what you know
Tumblewolf
  • Tumblewolf
I know that much I just can't figure out the math for it
anonymous
  • anonymous
\[y-(-4)=-\frac{ 3 }{ 8 }\left( x-5 \right)\]
triciaal
  • triciaal
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Tumblewolf
  • Tumblewolf
I don't have the other two points. From what I can figur out it should be -3/8x+4y=-15/8
triciaal
  • triciaal
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triciaal
  • triciaal
take a second to look at this. do the substitution simplify rearrange to the requested format.
triciaal
  • triciaal
do you have any more questions about it or did you take the time to do it?
Tumblewolf
  • Tumblewolf
I'm trying to do it and I still can't figure it out. I don't want someone to show me the answer I just want an explination. I have several others like this that I have no idea how to do.
triciaal
  • triciaal
I can't make you read. that is all you need to do. start again and read my response. let me know where you are having trouble
Tumblewolf
  • Tumblewolf
I got y=-3/8x-17/8 but that just doesn't seem right for the slope intercept
triciaal
  • triciaal
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Tumblewolf
  • Tumblewolf
I got 3x+8y=-17 as the final answer
triciaal
  • triciaal
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Tumblewolf
  • Tumblewolf
Where does the last 3 come from?
triciaal
  • triciaal
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Tumblewolf
  • Tumblewolf
Oh okay so I did get it right! Thanks! and another quick question. If given the two points and told it's parallel to the X axis how to I go about setting that up? If it's parallel to X then it doesn't have a slope
triciaal
  • triciaal
parallel to the x-axis means it is a horiZontal line equation will be y = (y-value where the line is)
Tumblewolf
  • Tumblewolf
So if the points are (1,5) and y=5? Where do I go from there?
triciaal
  • triciaal
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triciaal
  • triciaal
(1,5) is a single point
triciaal
  • triciaal
question probably reads: find the equation of the line parallel to the x-axis and passes through the point (1,5)
Tumblewolf
  • Tumblewolf
Similar but yes that's basically it
triciaal
  • triciaal
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Tumblewolf
  • Tumblewolf
So would the equation just be y=5? Is there a special horizontal standard form equation?
triciaal
  • triciaal
i am glad i took the time with you. do you see how easy this is when you stop to read and to apply what you know?
Tumblewolf
  • Tumblewolf
I have to teach myself this stuff and sometimes the way they explain things is hard. Usually I'm okay but for some reason this stuff is tricky for me
triciaal
  • triciaal
y = 5 is the equation for that line for any value of x, y = 5 the slope is zero as you already know and the intercept is 5 y = mx + b m = 0 zero times anything is still zero
Tumblewolf
  • Tumblewolf
So it wants me to write out how I got the answer. Do I just say that the slope is undefined and I can't divide by 0?
triciaal
  • triciaal
just take your time and then practice problems. math is not really tricky. need to practice and it becomes very easy to see everything
Tumblewolf
  • Tumblewolf
I can do high level statistics and I don't have a problem with physics, chemistry, and some calculus. It's just this stuff. Linear and me don't get alone
triciaal
  • triciaal
correction to be more precise or other there is no change in y for any change in x so the slope is undefined. the intercept is 5 so the equation of the line becomes y = 5
Tumblewolf
  • Tumblewolf
Ah okay I think I get it I promise just one more they didn't even cover this one So on another is the y-intercept is -3 and the points are (3,0) I would set it up as y=m(x+-3) which is y=m(x-3) how do I go from there?
Tumblewolf
  • Tumblewolf
I am so sorry for wasting all your time!
triciaal
  • triciaal
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Tumblewolf
  • Tumblewolf
so y=m(x+-3) or y=m(x-3)? What do I do with the points?
triciaal
  • triciaal
look at what i drew
Tumblewolf
  • Tumblewolf
it's the slope intercept formula
triciaal
  • triciaal
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triciaal
  • triciaal
now substitute
Tumblewolf
  • Tumblewolf
y=m(3-3) ?
triciaal
  • triciaal
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triciaal
  • triciaal
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triciaal
  • triciaal
you have to pay attention to the parenthesis
Tumblewolf
  • Tumblewolf
-1x+y=-3?
triciaal
  • triciaal
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triciaal
  • triciaal
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triciaal
  • triciaal
if you have any new questions open a new post.
triciaal
  • triciaal
is everything clear for what we covered ?
Tumblewolf
  • Tumblewolf
I think so? And again thank you for everything and I'm so sorry I took up all your time!!
triciaal
  • triciaal
it's ok. I am here to help. especially people who appreciate it eventually. keep practicing. all the best
Tumblewolf
  • Tumblewolf
Thank you again!n
anonymous
  • anonymous
\[y+4=-\frac{ 3 }{ 8 }\left( x-5 \right)\] 8y+32=-3x+15 3x+8y=15-32=-17 or second method eq. of line is y=mx+b because it passes through (5,-4) and has slope -3/8 \[-4= -\frac{ 3 }{ 8 }*5+b\] \[b=-4+\frac{ 15 }{ 8 }=\frac{ -32+15 }{ 8 }=-\frac{ 17 }{ 8 }\] so eq. of line is \[y=-\frac{ 3 }{ 8 } x-\frac{ 17 }{ 8 }\] or 3x+8y=-17

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